package com.gem.sms.filter;

import java.io.IOException;

import javax.servlet.Filter;
import javax.servlet.FilterChain;
import javax.servlet.FilterConfig;
import javax.servlet.ServletException;
import javax.servlet.ServletRequest;
import javax.servlet.ServletResponse;
import javax.servlet.annotation.WebFilter;
import javax.servlet.annotation.WebInitParam;

/**
 * 字符集过滤器
 */
@WebFilter(filterName = "CharacterEncodingFilter", urlPatterns = "/*", initParams = {
		@WebInitParam(name = "encoding", value = "UTF-8") })
public class CharacterEncodingFilter implements Filter {

	private String encoding;

	@Override
	public void init(FilterConfig filterConfig) throws ServletException {
		encoding = filterConfig.getInitParameter("encoding");
	}

	public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain)
			throws IOException, ServletException {
		//设置请求字符集
		request.setCharacterEncoding(encoding);
		//设置响应字符集
		response.setCharacterEncoding(encoding);
		chain.doFilter(request, response);
	}

	@Override
	public void destroy() {
	}
}
